The first symptom of hypothyroidism (not enough thyroid hormone) doctors mention is feeling very tired all the time. If you have no energy in the morning even though you slept well, your thyroid may be underactive. As a result you, most likely, sit most of the day and rarely, if ever, exercise. The price of leading an inactive lifestyle is high and it comes in the form of physical pain and obesity. Every extra hour of sitting increases the risk of diabetes by 22 percent, according to research.